Peg and her father live a simple life in an Irish fishing village. One day Sir Gerald arrives at the village to tell Pat that Peg is heir to estate of her grandfather, who hated Pat. The upshot of the will is that she must go to England for 3 years to learn to be a lady and that Pat can never see her again.

Captain Ambrose comes from a long line of distinguished sailors...but is all too susceptible to seasickness. After the war, he buys himself a nautical command on shore; a decrepit amusement pier at the British resort town Sandcastle-on-Sea, whose prim town council has outlawed arcade games as a form of gambling! Running the pier like a naval vessel, the captain's determination to make it a modern, going concern meets steady opposition. But with an unexpected new ally, he pursues a remarkable scheme to liberate his "ship" from land authorities...